Carbon-brush holder.



J. B. PETERS.

CARBON BRUSH HOLDER.

APPLICATION msn JAN-20,1913

' 1,206,907. Patented Dec. 5,1916.

\NVENTOR WITNESSES: 4Q g Q m arm,

UNITED STATES PATENT OFFICE.

JOHN B. PETERS, OI TOLEDO, OHIO, ASSIGNOR TO THE ELECTRIC AUTO-LITE COMPANY, OF TOLEDO, OHIO, A. CORPORATION OF OHIO.

CARBON-BRUSH HOLDER.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed January 20, 1913. Serial No. 743,076.

To all whom it may concern Be it known that I, JOHN B. PETERS, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Carbon-Brush Holders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of ref erence marked thereon, which form a part of this specification.

Figure 1 is a bottom or inner side view of the motor shell cap with the motor brushes and connecting leads attached thereto, with some parts removed and some in section, and Fig. 2 is a sectional View of the upper end portion of the motor shell with the cap and associated brush parts mounted thereon.

A cap 12 is mounted on the upper open end of the motor shell 7, and has a central bearing opening 13 therein for the upper end of the motor shaft, the outer end of said bearing opening, in the present instance, being closed without the shaft end by a plate 14, which is screwed or otherwise suitably secured to the cap. Insulatingly secured to the under side of the cap 12 by bolts 15, or in any other suitable manner, and projecting down into the end portion of the motor case 7 around the commutator, are a plurality of brush-holders 16, in the present instance four in number, and each provided with a brush-receiving opening 17, which is radially disposed with relation to the bearing opening 13 of the cap. A brush 18 is mounted within each opening 17 for free reciprocatory movements therein toward and away from the cap opening 13 and is influenced to move inward or to have yielding contact with the commutator by the pressure on the outer end thereof of one or more spring fingers 19, which have their opposite ends coiled one or more times about and attached to a pin 20 that is carried by an arm 21 projecting from one side of the holder 16.

Each brush 18 has a flexible lead 22 extending from its outer end and connected to a side portion of the holder 1,6, as by binding screws 23. Opposite brush-holders of the set are connected in pairs by conductors 24, as best shown in Fig. 1, and one of the field coils, which coils, in the-present instance, are two in number, is connected by the lead 26 to a brush-holder 16 of one pair, as by the clamping of the connecting part 27 to the holder by the binding screws 23. The other field-coil is connected by a lead 26 to one of the brush-holders of the other pair through the means of a connecting member 27 which is clamped to such holder by the binding screws 23 thereof.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is,-

In a brush holder for a motor, a plate, brush frames, each brush frame secured to the plate at one end of the brush frame, flexible connectors, the flexible connectors secured to the sides of the frames, carbon block brushes slidingly mounted in the frames and connected to the flexible connectors, the frames having laterally extending arms, pins extending transversely through the arms, coiled springs connected at the centers of the coils to the pins on each side of the arms and having arms which press upon the outer ends of the brushes and on opposite sides of the point of connection of the flexible connectors with the carbon block brushes.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

JOHN B. PETERS. Witnesses:

S. T. Know, 0. W. OWEN.

copies of thin patent may he obtained for live cents each, by addressing the "Commissioner of intent,

Washington, D. c. 

